Recently, double perovskite (DP) oxides denoted A₂B′B″O₆ (A being divalent or trivalent metals, B′ and B″ being heterovalent transition metals) have been attracting much attention owing to their wide range of electrical and magnetic properties. Among them, rhenium (Re)-based DP oxides such as A₂FeReO₆ (A = Ba, Sr, Ca) are a particularly intriguing class due to their high magnetic Curie temperatures, metallic-like, half-metallic, or insulating behaviors, and large carrier spin polarizations. In addition, the Re-based DP compounds with heterovalent transition metals B′ and B″ occupying B sites have a potential to exhibit rich electronic structures and complex magnetic structures owing to the strong interplays between strongly localized 3d electrons and more delocalized 5d electrons with strong spin–orbit coupling. Thus, the involved physics in the Re-based DP compounds is much richer than expected. Therefore, there are many issues related to the couplings among the charge, spin, and orbitals, which need to be addressed in the Re-based DP compounds. In the past decade, much effort has been made to synthesize Re-based DP compounds and to investigate their crystal structures, structural chemistry, and metal–insulator transitions via orbital ordering, cationic ordering, and electrical, magnetic, and magneto-transport properties, leading to rich literature in the experimental and theoretical investigations. This Review focuses on recent advances in Re-based DP oxides, which include their synthesis methods, physical and structural characterizations, and advanced applications of Re-based DP oxides. Theoretical investigations of the electronic and structural aspects of Re-based DP oxides are also summarized. Finally, future perspectives of Re-based DP oxides are also addressed.

中文翻译：

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Re基双钙钛矿的最新进展：合成，结构表征，物理性质，高级应用和理论研究

近来，由于钙钛矿（DP）氧化物具有广泛的电和磁性能，因此被称为A ₂ B'B''O ₆（A为二价或三价金属，B'和B''为杂价过渡金属）引起了广泛关注。 。其中，rh （Re）基DP氧化物，例如A ₂ FeReO ₆（A = Ba，Sr，Ca）由于它们的居里磁性高，金属样，半金属或绝缘行为以及大的载流子自旋极化而特别吸引人。此外，基于重新DP与heterovalent过渡金属B'和B“占据B位点具有表现出由于强烈局部3层之间的强interplays富电子结构和复杂的磁结构的电势的化合物d的电子和离域多5 d具有强自旋轨道耦合的电子。因此，Re-基DP化合物中涉及的物理学比预期的要丰富得多。因此，存在许多与电荷，自旋和轨道之间的耦合有关的问题，需要在基于Re的DP化合物中解决。在过去的十年中，人们为合成Re-基DP化合物付出了很多努力，并通过轨道有序，阳离子有序以及电，磁和磁传输特性研究了它们的晶体结构，结构化学以及金属-绝缘体跃迁，导致在实验和理论研究方面的文献丰富。本文将重点介绍Re-基DP氧化物的最新进展，包括其合成方法，物理和结构表征以及Re-基DP氧化物的先进应用。还总结了对Re基DP氧化物的电子和结构方面的理论研究。最后，还讨论了Re-基DP氧化物的未来前景。